nijuu: he is unfortunately very Steam centric I think (he does like his old classics though) he rarely mentions indie sales either.
I think he mentioned somewhere that he speaks alot about Steam because its the biggest and most gamers see the promotions on Steam front page -> thus he makes videos about the brand new games and releases, instead of old classics.
Also i think he mentioned there are lots of people doing lets play videos of old games, but not so many people doing first impressions/review of the brand new (indie) games -> thus as he is doing it for business, it makes sense to do content that no one else is making so much, yet people are aware of those game ads on steam.
Or something like that - just vague memories.